package com.yan.utils;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import com.yan.cache.CacheBean;

public class IpUtils {

	public static String getIp(HttpServletRequest request) {
		String ipAddress = request.getHeader("x-forwarded-for");
		if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("Proxy-Client-IP");
		}
		if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getRemoteAddr();
			if (ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")) {
				// 根据网卡取本机配置的IP
				InetAddress inet = null;
				try {
					inet = InetAddress.getLocalHost();
				} catch (UnknownHostException e) {
					e.printStackTrace();
				}
				ipAddress = inet != null ? inet.getHostAddress() : null;
			}
		}
		// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
		if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
															// = 15
			if (ipAddress.indexOf(',') > 0) {
				ipAddress = ipAddress.substring(0, ipAddress.indexOf(','));
			}
		}
		return ipAddress == null ? "" : ipAddress;
	}

	public static void main(String args[]) {

		CacheBean.BJOPBEAN.put("yan", "yan");
		CacheBean.BJOPBEAN.getIfPresent("ya" + "n");

		System.out.println(CacheBean.BJOPBEAN.getIfPresent("yan"));
	}

}
